In “The Sound of Thunder,” another one of these mysterious signals appears. But this time? It’s over Saru’s home planet Kaminar, which we were first introduced to in “The Brightest Star.” Discovery immediately gets caught between the plight of the Kelpiens and the seemingly predatory species, the Ba’ul. But like most things, there’s more going on than meets the eye.

In Front of the Camera

Hannah Spear, last seen back in the Star Trek Discovery Short Treks: The Brightest Star, reprises her role as Saru’s sister Siranna.

Javier Botet delivers a terrific performance as Ba’ul creature, one I hope we get to see repeated.

David Benjamin Tomlinson returns as Linus for a hot second. And then later as a random Kelpien wandering about.

Raven Dauda comes back as Dr. Tracy Pollard, a role I’m worried we’ll see less and less of now that Wilson Cruz is back. We first met her last season in “Vaulting Ambition” and “The War Without, the War Within,” and she’s been nothing but a treasure for this show.

Behind The Camera

“The Sound of Thunder” was directed by Douglas Aarniokoski, which serves as his third time directing in the Star Trek Discovery universe. Most recently he directed the Short Trek companion to this episode, “The Brightest Star.” But we first saw his work in last season’s “Lethe.”

The story for “The Sound of Thunder” was written by what’s shaping up to be the Saru-centered powerhouse duo of Bo Yeon Kim and Erika Lipoldt. They’re also responsible for the aforementioned “The Brightest Star, as well as last season’s “Into the Forest I Go.”

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